Tension device



A. H. SAWTELL.

TENSION DEVICE.

APPLICATION FILED JAN. 24. 1922.

1 ,437,9 97, Patented Dec. 5, 1922.

IN V EN TOR.

A TTORNEY rear.

Patented Dec. 5,

ALBERT H. SAWTELL, or wrn'rrmor, MASSACHUSETTS. I

TENSION DEVICE.

Application filed January 24, 1922. Serial No. 531,499.

To all whom it may concern Be it known that I, ALBERT H. SAw'rELL, acitizen of the United States, residmg at Winthrop, in the county ofEssex and State ofv Massachusetts, have invented certain new and usefulImprovements in Tension Devices, of which the following is aspecification.

My invention relates to tensioning devices and is particularly adaptedto devices of the type set forth in my prior United States Patent No.1,l02,89l issued Jan. 10, 1922.

In such devices the eyelets through which the filaments passedtransversely of the body were so located that only an end of a filamentcould be threaded therethrough, and even then some hook or auxiliaryimplement was required to be inserted through the eyelets to engage thefilament end and perform the threading operation.

The essential objects of my present invention are to facilitate andincrease the speed of the threading operation; to enable the,

insertion of a filament or thread into the eyes even after the threadhas been engaged at its ends on "spools, bobbins, or a warp beam; and tomake the use of auxiliarythread ing implements unnecessary.

To the above ends primarily my invention consists in-such parts and insuch combinations of parts as fall within the scope of the appendedclaims.

In the accompanying drawings which form a part of this specification,

Figure 1 is a plan of the device with the ball omitted,

Figure 2, a front elevation of the same,

Figures 3 and 4:, sections respectively on lines 8-8 and 4l-t of Figure1 with the ad'- dition of the ball, and

Figure 5, a detail view of one of the eyelets.

Like reference characters indicate like parts throughout the views.

In the drawings 6 is the base having an opening 7 for a supporting rod 9engaged by the set screw 10. Embracing a reduced portion 11 of the baseis a vertical tubular wall 12 attached thereto by a screw 13, and havingclearing openings 14. A diametrioal shaft 15, fast in the wall hasrotatably mounted and longitudinally slidable thereon a roller or rotaryseat 17 provided with a concave periphery 18 upon which rests a ball 20having an arcuate line of contact longitudinally of the seat, and asliding fit in the body wall. I

The body wall 12 is provided, at diametri cally opposite points in theplane of the lowest point in the seat periphery, with.

thread openings consisting of holes 22 in which are fast eyelets 28 ofporcelain or other. hard material, each provided with a verticallongitudinally disposed slot 25 extending to its central bore or opening27.' 1

An arcuate slot 30 in the wall 12 extends to the tops of the slots 25 ofthe eyelets. Integral with the exterior of the body is arcuate laterallyprojecting shelf or shoulder 32 extending to the eyelets, and whoseupper face isin the horizontal plane of the lower edge of the slot. InFigure 1 a strand or thread 33 isindicated bya broken line in itsthreaded posit-ion between the ball 20 and its rotary seat 17.

' The operation of the device is as follows. The thread or strand to beinserted is manually broughtin a' horizontal position downwardly alongthe, exterior surface of the body 12 until it reaches the ,slot 20 orcontacts with the upper face of the guide shoulder 32, and is thenreleased or pushed towards the eyelets until it reaches the slots 25,and is thereupon depressed therethrough into the openings 27 thereof.Vfhile the member 32 is not essential, it increases the speed of thethreading operation by automatioally locating the slot 30 and the strandto the latter.

I claim 1. In a tension device, a tubular body proguiding vided with atransversely disposed slot in an intermediate portion thereof,eyelets-for a filament in the body provided with. guide slotscommunicating with the firstslot, a rotary seat in the body engageablewith the filament, and a .ball in the body engageable with the seat. r2. In a tension device, a tubular body vided with a transverselydisposed slot in an. intermediate portion thereof, a laterally.

extending projection upon the exterior of prothe body flush with thelower margin ofthe" slot, eyelets for a filament in opposite 'por:

tions of the body provided with guide slots registering with the firstslot, a seat'inter posed in the body between the eyelets,and

a ball in the body upon the seat.

In testimony whereof I have affixed my signature.

ALBERT H. SAWTELL.

